Compare NSF Music Data. Ignoring Strings Header(small nsf util like 'cmp')

nsfcmp.bat

@rem ===========================================================================
@rem Compare NSF Music Data. Ignoring Strings Header.
@rem @author noromanba
@rem @license MIT License http://noromanba.mit-license.org/2012
@rem @see https://gist.github.com/1547235
@rem @see http://uraran.jp/psg/nsfspec_j.txt
@rem @see http://dic.nicovideo.jp/a/nsf
@rem @see http://man.cx/cmp(1)/ja
@rem ===========================================================================

@echo off
cd %~dp0

if "%2"=="" @echo Usage: nsfcmp FILE1.nsf FILE2.nsf && exit /b 2

::TextInfoHeaderAddr=0x0E-0x6F
set PREHEAD=0x0D
set PREBODY=0x6D

cmp -n %PREHEAD% %1 %2 && cmp -i %PREBODY% %1 %2
::echo %ERRORLEVEL%